weird

var http = require('http'), fs = require('fs'), path = require('path');
http.createServer(function (request, response) {
  response.writeHead(200, {'Content-Type': 'text/plain; charset = utf-8'});
  var url = request.url, file_url = path.join(__dirname, request.url);
  if(url === '/'){
    console.log(file_url + 'index.html');
    fs.readFile(file_url + 'index.html', 'utf8', function(error, content){
      // if (error) throw err;
      response.write("hohohoo", 'utf8'); //does not print in broswer
      // response.write(content); //does not print in browser
      console.log(content); //prints well in konsole with data read from file
    });
  }
  response.end();
}).listen(1337, "127.0.0.1");
console.log('Server running at http://127.0.0.1:1337/');